The level is the height of a B-tree table or a B-tree index in mysql 5.6. My question is how to get the height(blevel) of a B-tree table or a B-tree index in mysql 5.6? Thanks.
In oracle database,we can use the following statement to query the blevel of a index select index_name,blevel from dba_indexes; > -----Original Message----- RE: how to get the levels of a table or a index in Mysql 5.6? Or maybe the number of levels in the BTree? Rule of Thumb: logarithm base 100 > -----Original Message----- > From: Hartmut Holzgraefe [mailto:hart...@skysql.com] > Sent: Monday, July 08, 2013 6:38 AM > To: mysql@lists.mysql.com > Subject: Re: how to get the levels of a table or a index in Mysql 5.6? > > On 08.07.2013 04:23, 李炜(平安科技数据库技术支持部) wrote: > > > how to get the levels of a table or a index in Mysql 5.6? > > Level? What is level supposed to be in that context? > Cardinality? Or something completely different? > > /me confused ... > > -- > Hartmut Holzgraefe <hart...@skysql.com> Principal Support Engineer > (EMEA) SkySQL AB - http://www.skysql.com/ > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql ******************************************************************************************************************************** The information in this email is confidential and may be legally privileged. If you have received this email in error or are not the intended recipient, please immediately notify the sender and delete this message from your computer. Any use, distribution, or copying of this email other than by the intended recipient is strictly prohibited. All messages sent to and from us may be monitored to ensure compliance with internal policies and to protect our business. Emails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, lost or destroyed, or contain viruses. Anyone who communicates with us by email is taken to accept these risks. 收发邮件者请注意： 本邮件含保密信息，若误收本邮件，请务必通知发送人并直接删去，不得使用、传播或复制本邮件。 进出邮件均受到本公司合规监控。邮件可能发生被截留、被修改、丢失、被破坏或包含计算机病毒等不安全情况。 ********************************************************************************************************************************
